Splitting method cannot be assigned

What causes this issue?

A splitting procedure cannot be assigned, for one of the following
reasons:
There is no line item table defined for table &V1&.
The following fields are missing from the line item table:
WSL
RWCUR
BELNR
BUZEI
LINETYPE
XSPLITMOD
You can check the exact definitions of these fields (data elements and
so on) in table GLFLEXA.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.